Improvement in globe-valves



' M. MURPHY.

improvement in Glob-Valves, N0. 4,844. Patented May16,1871

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than-D $21M and cm MATTHEW MURPHY, or CHARLOTTE, NORTH CAROLINA.

Letters Patent No. 114,844, dated May 16, 1871; antedated May 15,-1871.

IMPROVEMENT IN GLOBE-VA LVE S.

The Schedule referred to in these Letters Patent gnd'making part of the same.

To all'whom it may concern:

purposes; and

It consists in'the construction, arrangement, and combination of 'parts-as hereinafter described. l

The accompanying drawingrepresents 'a vertical longitudinal section of 'a globe-valve constructed according to my invention.

A is the shell of the valve;

Bis a chambered cap, which is screwed into the shell A, the end of which forms an upper seat for the valve;

Q is the valve with two faces;

1) is the valve-stem;

E is the chamber for packing the stem;

F is the nut through which the valve-stem works, the lower end of which acts as a stuffing-box on the packingin the chamber E;

. G is a collar on the nut I and His a thimble-nut, with an inward flange, which engages with the collar G and screws onto the gland B, as seen in the drawing.

This not H holds the stem-nut F stationary, and

draws it down onto the packing, so that all leakage is prevented, and the screw-thread of the stem is effectually protected from the action of the steam ,or other fluid or liquid.

By means of the upper valveseat I the stem may be packed when'there is a pressure of steam on thevalve, and by raising the nuts F-and H the valve ma be ground to either seat without di'liiculty.

By this arrangement a durable and effective valve is made, not likely to get out of order, and one which obviates many of the objections to the globe-valves now in use.

Havingthus described my invention,

I claim as new and desire 'tosecure by Letters Patent- Thecollared nut F G, combined, as described, with a cap, B, having the packing-chamber E, arranged as I and for-the purpose specified.

MATTHEW MURPHY.

XVitnesses:

It. S; OuLrnrER, W. .W. Muses.- 

